Corrugated covers

ABSTRACT

A corrugated cover component is formed from a sheet formed with parallel fold lines and a row of cut-outs. The cut-outs permit the part of the sheet on one side of the row to be corrugated inversely relative to the part on the other side of the row.

July 11, 1972 R. 1.. MOS'ELEY E 3,676-,28

CORRUGATED COVERS Filed Feb. 2, 1970 2 Sheets-Sheet 1 July 11, 1972 R MoSEl-EY 3,676,285

CORRUGATED COVERS.

Filed Feb. 2, 1970 2. SheetsSheet 2 United States Patent Oflice Patented fiffii 9 Int. Cl. 153% 3/10, 3/28 US. Cl. 161-109 4 Claims ABSTRACT OF THE DISCLOSURE A corrugated cover component is formed from a sheet formed with parallel fold lines and a row of cut-outs. The cut-outs permit the part of the sheet on one side of the row to be corrugated inversely relative to the part on the other side of the row.

BACKGROUND OF THE INVEN'IllON Field of the invention This invention relates to corrugated covers.

Description of the prior art Scissor hoists are at present quite commonly used and include a base, a platform which is usually rectangular and is located above the base, a scissors linkage between the platform and the base and piston and cylinder means operative to move links of the linkage to cause expansion or contraction thereof, so as either to raise or to lower the platform relative to the base.

In order to ensure that users limbs are not allowed to become trapped between the platform and the base on lowering of the platform, curtain and barrier arrange ments have been provided between the platform and the base so as to enclose the space therebetween but these curtain and barrier arrangements have not been completely successful.

It has accordingly been proposed to provide a corrugated cover operative between the platform and the base but, as scissor hoists vary in dimensions, it is desired to provide four lengths of corrugated cover material of widths approximating to the widths of the sides of the platform so that the customer can cut the lengths of corrugated cover material to the required lengths and then joint the four lengths of corrugated cover material to the sides of the :base and the platform of the hoist. To enclose the space between the base and the platform completely it is necessary to joint the lengths of corrugated cover material to each other at the corners of the base and platform but no satisfactory corner connecting arrangements have been previously available.

It is accordingly an object of the present invention to provide an arrangement for connecting together lengths of corrugated cover material to form an enclosure for the operating mechanism of a scissor hoist.

SUMMARY OF THE INVENTION A row of cut-outs is formed in a sheet to enable the part of the sheet on one side of the row to be corrugated inversely relative to the part on the other side of the row.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a plan view of part of a corner connecting component and a sheet to which it is to be connected.

FIG. 2 is a plan view of part of a sheet of a corrugated cover having cut-outs located in a central portion of the sheet.

FIG. 3 is a perspective view of the assembled corner connecting component and sheet shown in FIG. 1.

FIG. 4 is a schematic part-sectional view of a scissors hoist having a corrugated cover comprising four corner connecting components.

DESCRIPTION OF THE PREFERRED EMBODIMENTS "As shown in FIG. 4, a scissors hoist 20* includes a base 22, a platform 21 and a scissors linkage comprising two pairs of links 250 and 25b. The link 25a is pivotally secured to the base 22 by a pin 28a and carries a roller 24b which is movable along the lower surface of the platform 21. The link 25b is pivotally secured to the platform 21 by a pin 28b and carries a roller 24a which is movable along the upper surface of the base 22. The links 25a and 25b are pivotally interconnected by pins 26 to permit a scissors action to be effected by an hydraulic ram 27 which acts on link 25a to raise or lower the platform 21 relative to the base 22.

A corrugated cover assembly 23 of square section is secured at one periphery thereof to the base 22 and at the other periphery thereof to the platform 21 so as to contract and expand when said platform is lowered or raised. The corrugated cover assembly comprises four sheets of corrugated cover material which are connected together as shown in FIG. 3.

As shown in FIG. 1, and BIG. 3, each corner fastening device is formed from two sheets 10 and 13 of the material from which the sides of the assembly are formed, each of said sheets being formed with a series of fold lines corresponding to the fold lines formed in the length of corrugated cover material forming the sides of the assembly so that each of said sheets can be secured in face to face relationship with one of the side members of the cover assembly.

A series of cut-outs 11 are formed in one sheet 10 of said sheets and the series of cut-outs are arranged in a row adjacent an edge of said sheet 10 and the cut-outs 11 are formed by forming a pair of zig-zag cuts in the sheet, there being a first zig-zag cut 11a in which each line of the zigzag is inclined at an angle of to each adjacent line with the lines of the second zig-Zag cut 11b inclined each at an angle of say to each adjacent line of that zigzag. The two zig-zag cuts 11a and 11b are arranged so that the peaks of one zig-zag register with the peaks of the other zig-zag but the troughs of the two zig-zags 11a and 11b are spaced apart, the troughs being spaced inwardly from the edge of said sheet by a further distance than the peaks of the zig-zag. The cut-outs 11 are thus of a generally wing configuration and permit the sheet of corrugated material to be folded such that the part of the sheet on one side of the row, that is the edge portion 10a of the sheet, can be corrugated inversely to the main portion 10b of said sheet 10.

Where We have referred to one part of the sheet being corrugated inversely relative to the other part of the sheet we mean that the portion of a fold line on one side of the row which forms a trough is in alignment with a portion of the fold line on the other side of the row which forms a peak.

A layer 12 of a fabric material is bonded to the sheet 10 so as to cover the cut-outs 11 formed therein, the material of layer 12 being more easily deformable than the resiliently deformable material from which the sheet 10 is formed. a

The sheet 10 formed with the cut-outs 11 is attached to the other corrugated sheet 13 of the corner component by means of U-section metal clips 16 which are fitted over the edges proper of the two sheets 10 and 13, the U-section clips being formed of a deformable metal so that, when they are fitted over the adjacent edge portions of sheets 10 and 13 and deformed they hold said edge portions in contact with each other.

When the edge portions have been connected together in this way the main portion b of the first sheet 10 is arranged in a plane transverse to the plane of the corrugated second sheet 13 and the two sheets can then be secured to the adjacent sides of the corrugated cover assembly.

Alternatively, corners of a corrugated cover may be produced by forming a series of cut-outs in a central portion of a sheet of corrugated material, as shown in FIG. 2. A row of cut-outs extends between the portions 15a and 15b of a sheet 15, so that by bending sheet 15 about a line passing through the points of intersection of the cuts 11a and 11b the sheet 15 can be shaped with the portion 15a lying in a transverse plane relative to the portion 15b.

Although the invention has been described above in relation to a corrugated cover assembly for a scissors hoist, a similar corner connecting arrangement can be provided for a box-type corrugated cover for, for example, a reciprocating part of a machine tool.

We claim:

1. A corrugated cover component which comprises a sheet of a resiliently deformable material formed with a series of parallel fold lines and a series of cut-outs formed in a portion of said sheet, the series of cut-outs being arranged in a row extending normally of the fold lines and the part of the sheet on one side of said row being corrugated inversely relative to the part on the other side of said row.

2. A component according to claim 1 wherein each of said cut-outs comprises a four-sided figure defined by a pair of Vs with their apices one within the other.

3. A corner coupling component for connecting together lengths of corrugated cover which are arranged in transverse planes, which component comprises a sheet of a resiliently deformable material formed with a series of parallel fold lines and a series of cut-outs formed in an edge portion of said sheet, the series of cut-outs being arranged in a row which is spaced inwardly from the edge proper of said sheet and extends normal to the fold lines and the part of the sheet between the row and the edge proper being corrugated inversely relative to the part of the sheet on the other side of the row.

4. A component according to claim 3 wherein each of said cut-outs comprises a four-sided figure defined by a pair of VS with their apices one Within the other.

References Cited UNITED STATES PATENTS ROBERT BURNETT, Primary Examiner W. E. HOAG, Assistant Examiner US. Cl. X.R. 16ll13, 133 

